Customizing fb app that creates app42 to run leaderboards

Hi, I followed this tutorial to create fb leaderboards. http://blogs.shephertz.com/2013/09/24/integrat-social-leaderboard-in-unity3d-with-facebook-sd

How i can customize fb app (add picture and more information about game), that app42 created on facebook to run it ?
Or can i use my own fb app to connect it to app42 servises and run leaderboards? (see picture FbApp)
I cant find any information about this and sorry for my enlgish.
:frowning:

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